Tag archive for: Raspbian

How to read soil moisture level with Raspberry Pi and a YL-69/FC-28 moisture sensor

When I did a Raspberry Pi 4 Model B review, I got myself a Raspberry Pi 4 Model B. Therefore, the current Raspberry Pi 3 Model B+ that I have been using for validating Raspberry Pi ideas became available for another IoT project in the house.

So what should I do with my Raspberry Pi?

Since I have always wanted to build my own indoor herb garden, I plan to use it to help my plants grow well.

When I bought the LED Grow Lights, I am able to give my plants consistent lighting. Given that consistent lighting is solved, I can use my Raspberry Pi 3 to monitor soil moisture so that I can provide water my plants better.

Given these points, this is a proof of concept that I did to read soil moisture level with my Raspberry Pi and a YL-69/FC-28 moisture sensor.

How to use the MCP3008-I/P chip to help your Raspberry Pi read digital data from analog sensors

Although your Raspberry Pi is unable to read analog input out of the box, you can get a MCP3008 I/P ADC chip to help your Raspberry Pi do so.

MCP3008 IP ADC chip up close

When you connect a MCP3008 I/P chip to your Raspberry Pi, you can read up to 8 analog inputs with SPI.

Given these points, this post will show you how you can use the MCP3008 I/P chip to help your Raspberry Pi read digital data from analog sensors.

How to enable SPI master driver in Raspbian using raspi-config

Your Raspberry Pi has the ability to communicate with hardware using the Serial Peripheral Interface specification. However, this master driver is disabled by default.

If you want to use the SPI master driver to communicate with devices, then you will need to enable it.

Let’s look at how we can enable the SPI master driver using the Raspberry Pi Software Configuration Tool (raspi-config).

How to use Python 3 virtual environments to run Python 3 applications on your Raspberry Pi

Whenever I am working on a Python 3 project, I will always use a Python 3 virtual environment for running that project. Therefore, I tend to do the same when it comes to building Python 3 applications to run on a Raspberry Pi.

If you are looking to build Python 3 applications to run on your Pi, then you may find this article useful for you.

How to host a static website on your Raspberry Pi with Nginx running on Raspbian Buster Lite

After you had understood HTML, CSS and JavaScript from The Web Developer Bootcamp, you can start to host a static website on an actual web server.

If you had been the kind of fan who buy newly-launched Raspberry Pis, then you may find some lying around the house collecting dust.

In this situation, why not use one of your Raspberry Pi to host something that you had just learnt?

Given that, let’s look at how you can host a static website on your Raspberry Pi with Nginx running on Raspbian Buster Lite.

Why buy the Raspberry Pi Zero W?

When you have seen the Raspberry Pi 4 with 4GB ram, you may wonder why should we even be bothered with the earlier versions.

If you have been following Seeed Studio, you may have heard that they had included Raspberry Pi Zero W in their product catalogue.

I welcome this move from Seeed Studio with open arms.

Since I live in Singapore, I will be able to shave hefty shipping costs getting the Pi Zero W from Seeed Studio instead of vendors from the west. If you are staying in countries that are nearer to Guangzhou, then the real cost of your Pi Zero W will be much closer to the 10 USD price tag.

But why buy the Raspberry Pi Zero W?

In case you are thinking of whether to trade 10-ish bucks for one, here are some reasons why you should have a look at the Raspberry Pi Zero W for your next Raspberry Pi project.

How to host a WordPress website on a Raspberry Pi with Raspbian Buster Lite and Nginx

If you are thinking of starting a blog about computer technology, then you can consider hosting a WordPress website on your Raspberry Pi.

Since Raspberry Pi is a capable machine that does not take up too much space and power, it is a good as a web server.

In addition, if you have an Internet subscription that does not block port 80 and 443, hosting a WordPress at home can be cost effective.

Given these points, let’s look at how we can host a WordPress website on a Raspberry Pi with Raspbian Buster and Nginx.

Installing Certbot on Raspbian Buster for obtaining Let’s Encrypt’s browser-trusted certificates for your Raspberry Pi server applications

Certbot + Raspbian logo

When you build Raspberry Pi server projects with Raspbian Buster, browser-trusted certificates can be needed.

Since the inception of Let’s Encrypt, many webmasters had been able to deploy web applications that encrypt communication channels with browser-trusted certificates.

Most importantly, Let’s Encrypt provide all the magic for free.

Let’s Encrypt certificates are automatically issued by software participating in the ACME protocol. Therefore, we will need to run such a software on a Raspberry Pi web server for serving HTTPS with browser-trusted certificates.

Given that, let’s see how we can install Certbot on Raspbian Buster.

How to setup Raspbian Buster Lite for Raspberry Pi server projects

When I did a review for Raspberry Pi 4 Model B, the idea of using the Pi 4 for server applications is clear. Since Raspbian Buster Lite was released alongside the Pi 4, we can use it for new Raspberry Pi server projects. If you are thinking of building Raspberry Pi server projects, then you […]